this is an extract from the Knights Hall in the Building Guide accessed through The Hub.

Note: Trials and tribute goals will complete themselves when you've satisfied a random number of actions. Eg, adventure badge, you have to do lots of adventures. Try not to concentrate on them, let them just finish by normal play. The exact numbers for each badge isn't known. We just know it's lots! Sorry we can't be more specific, there just isn't a specific answer.